CVPPPL/PDHEP/C&P/NIT-185/2021/457 : Diamond Core drilling including driving, ramming of drill holes for lowering of casing of PX, HX & NX size for 01 (one) drill hole of (+/-) 135.00 m deep from the surface at De-silting Chamber in Dam area location including core preservation & water permeability test in all type of strata as per relevant IS codes for Kirthai-II HE Project